//
// Created by DonAzufre on 24-5-18.
//

#include <stdio.h>


int fib(int n) {
    if (n == 1 || n == 2)
        return 1;
    else
        return fib(n-1) + fib(n-2);
}

int main() {
    int a;
    printf("input a number: ");
    scanf("%d", &a);
    printf("fib(a) = %d\n", fib(a));
    return 0;
}